Growth of porous anodic TiO2 in silver nitrate solution without fluoride: Evidence against the field-assisted dissolution reactions of fluoride ions

The Anodization of Thin Titania Layers as a Facile Process towards Semitransparent and Ordered Electrode Material

“…However, Fahim et al [ 44 ] achieved a bundles tubular structure of a length of 500 nm in aqueous solution containing only sulphuric acid (fluorine free electrolyte). Similar results have been observed by Lu et al [ 45 ] when anodizing Ti substrate in aqueous solution of silver nitrate (also fluoride ion free electrolyte). The results achieved in both experiments confirm that fluoride ions are not essential for the initiation of the formation of the porous structure.…”

Effect of PMMA sealing treatment on the corrosion behavior of plasma electrolytic oxidized titanium dental implants in fluoride-containing saliva solution

“…It is generally known that corrosion resistance can be determined by the combination of low I corr and high E corr . When compared with the uncoated dental implant sample, the E corr of the coated samples increased, and the I corr of the coated samples decreased as well, because ceramic PEO coatings (TiO 2 ) are capable of blocking a significant amount of corrosive ions such as Cl − and F − in both media [70]. PEO coatings' anticorrosion properties are determined by a combination of their thickness, roughness, porosity, and chemical composition [70].…”

Fluoride-free synthesis of anodic TiO2 nanotube layers: a promising environmentally friendly method for efficient photocatalysts

“…The second theory of nanotubular formation has been reported wherein the nanotubular structure forms around generated oxygen bubbles and relies on the viscous flow model, the oxygen bubble mold effect, and electronic current theory (so-called bottom-to-top synthesis). [26][27][28][29][30] To this day, there are only a few reports on TNT layers prepared in nitrate-based electrolytes [31][32][33][34][35][36] compared with the thousands of papers on TNT layers prepared in fluoride-containing ones. However, in some reports, 32 nitrates are added to fluoride-containing organic-based electrolytes to improve the morphological features of the TNT layers.…”

“…So far, the successful formation of TNT layers in fluoride-free nitrate-based electrolytes has been obtained using NH 4 NO 3 , 33–35 NaNO 3 , 36 KNO 3 , 36 and AgNO 3 . 31 Sr(NO 3 ) 2 is another potential nitrate-based electrolyte applicable for TNT layer synthesis. To the best of our knowledge, there is no report on anodic TNT layers prepared in Sr(NO 3 ) 2 electrolytes.…”